Hi Samir,
Thanks for using Syncfusion products.
Currently we don’t have option to customize the origin of area series. But, we have achieved your requirement by workaround. You can download the workaround sample from below location. In this sample, we have used
RangeAreaSeries to make the area visible from negative value.
Sample: http://www.syncfusion.com/downloads/support/forum/131462/ze/RangeAreaChart1922409968 Please check the sample and let us know if you need further assistance on this.
Regards,
Saravana Pandian M.